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US4943710A
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US
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Image sensor and manufacturing method for the same
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1988-06-22
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Granted: 1990-07-24
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Expires: 2008-06-22
Abstract
Abstract This invention relates to an image sensor and manufacturing method for the same.
Inventors
- 👤 Mitsunori Sakama
- 👤 Takeshi Fukada
- 👤 Naoya Sakamoto
- 👤 Nobumitsu Amachi
- 👤 Shigenori Hayashi
- 👤 Takashi Inushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:27
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10841; H; H04; H04N; H04N25/00; H04N25/70; H04N25/701; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/223; H10F30/2235; H10F39/00; H10F39/10; H10F39/12; H10F39/18; Y; Y10; Y10S; Y10S148/00; Y10S148/092
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A image sensor comprising: a plurality of photosensitive elements; a plurality of resistance each of which is connected to corresponding one of said elements in series; a voltage source for producing a voltage across each series connection comprising of said element and said resistance; and a means for detecting the voltage levels at the connecting points of said element with the corresponding resistance, wherein the value of said resistance is selected to make maximum the differential voltage at the connecting point between the voltage when this sensor is exposed to illumination and the voltage when this sensor is not exposed to illumination.
Claim 2
Dependent Claim
102 words
A image sensor comprising: a plurality of photosensitive elements; a plurality of resistance each of which is connected to corresponding one of said elements in series; a voltage source for producing a voltage across each series connection comprising of said element and said resistance; and a means for detecting the voltage levels at the connecting points of said element with the corresponding resistance, wherein the value of said resistance is selected to make maximum the differential voltage at the connecting point between the voltage when this sensor is exposed to illumination and the voltage when this sensor is not exposed to illumination.
Claim 3
Dependent Claim
24 words
The sensor of claim 1 wherein said photosensitive element is such that the current passing therethrough exponentially increases as the voltage thereacross increases linearly.
Claim 4
Dependent Claim
23 words
The sensor of claim 2 wherein said detecting means includes a multiplexer which selects one of the output signals from said photosensitive elements.
Claim 5
Dependent Claim
29 words
The sensor of claim 3 wherein said detecting means further includes a comparison circuit which judges whether the output level of said multiplexer is higher than a certain level.
Claim 6
Dependent Claim
27 words
The sensor of claim 4 wherein said detecting means further comprises a buffer circuit through which the output of said multiplexer is inputted to said comparison circuit.
Claim 7
Dependent Claim
15 words
The sensor of claim 5 wherein said buffer circuit is a high impedance voltage follower.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |